Method of teaching the deaf to hear and mutes to speak



H. L. WARWICK METHOD OF TEAGHING THE DEAF TO HEAR AND MUTES 'IO SPEAK Filed Oct. 11, 1926 f$fi Patented July 10, 1928.

UNITED STATES "PATENT OFFICE.

HAROLD L. WARWICK, OF FORT WORTH, TEXAS.

METHOD OF TEACHING THE DEAF TO HEAR AND HUTES TO SPEAK.

Application filed October 11, 1826 Serial No. 140,959.

My invention relates to amplifying sounding devices for teaching the deaf to hear and for teaching mutcs to speak; and the ob ect is to produce simple devices for first detecting whether or not a patient has a residuum of hearing that would come withln the voice range and then provide means for enabling the deaf or hard of hearing to hear music, musical sounds, or the human voice, and to hear their own voices, and in this manner teach them to speak. The process is to drill the patients in the preliminary stages until they can learn and appreciate sounds both in hearing and speaking. Other ob ec ts and advantages will be fully explalned in the following description and the mvention Will be more particularly pointed out in the claims.

Reference is had to the accompany ng drawings which form a part of this apphcation.

Fig. 1 is a perspective view of the apparatus or machine.

Fig. 2 is a plan view of the machine with 2 the top removed to show the complete working devices.

Fig. 3 is a side elevation of a receiver ack.

Fig. 4 is a diagrammat c view of the hook-up.

Similar characters of reference are used to "indicate the same parts throughout the several views.

The apparatus is provided wlth two transmitter jacks 1 and 2. The ack 1 1s electrically connected to the prlmary 3 and the jack 2 is electrically connected to the pnmary 4.. There are two primaries on the transmitting side of one secondary. The primaries 3 and 4 consistvof two 0011s which are electrically connected to the common point 5. The point 5 is electrically connected to the rheostat 6 by a wire 7, and through the rheostat 6 to the negative A battery. The secondary 8 is connected to the in-put terminals 9 and 10 of an ordinary three-stage resistance coupled amplifier, using vacuum tubes 11 and having plates 12 and grids 13, in connection w1th the positive and negative of B batteries. The machine is provided with two out-puts 14 and 15 for connection with the ear phones. The receiver jack 15 is connected directly with the positive pole of the B battery and also electrically connected to the three-stage amplifier by connections through plates 12.

The receiver jack 14 is connected to the '15 are also connected to positive pole of the same B battery and also connected with the jack 15 and with the amphfier plates 12. The receiver jacks 14 and the filament control rheostat 16. A feature of this invention is that there are two primaries on the trans- IIllSSlOIl side of the coils and only one secondary on the opposite side of the core'17. Two parallel wires are wound on the core which constitutes the primary of the transmitters 1 and 2. The out put of the secondary is impressed on the grid 13 of the first amplifying tube 11 and this is repeated through all the tubes 11 of the amplifier in the ordinary manner. A plu in the receiver jack 15 will light up al tubes 11 of the amplifier and a plug in the receiver 14 y will light up only one tube 11, the tube next to the secondary 8.

To start with a new pupil, the circuits are connected with a musical instrument of some kind,a phonograph or similar instrument, and the pupil puts on the ear phones. There may be several pupils,each having a pair of ear phones. They will usually show by the expression of the face when they hear. The teacher uses one transmitter to teach the pupils while the pupils wear the ear phones. A pupil is also required to make-sounds or talk through a transmitter held in his hands at the same time he Wears the ear phones. In this way he hears his own voice and thereby learns to modify his speech, in his efforts to imitatehis teacher. Two jacks 14 and 15 are used as the out-put. 15 is an added stage to further increase the amplification ofthe sound. The amplification mechanism includes audio resistance amplification 18 and fixed condensers 19.

The pupil in order to hear his own voice may use either jack 1 or jack 2 and use ear phones connected to either jack 14. or jack 15. The teacher can determine by experiment which receiving jack the pupil should use. The teacher can use either jack ,1 or jack 2.

What I claim, is,-

1. The method of training the voice of persons of defective hearing and speech, which consists in electrically transmitting to such person through bone construction amplified speech sounds, causing the person to simulate the sounds which he hears, and transmitting and amplifying the same similarly to the original sounds to his own hearing senses for comparison.

2; The method of training the voices of persons of defective hearing and speech, which consists in electrically transmitting to such person sounds for detecting whether or not a person has a residuum of hearing, commencing with,low sounds and gradual amplifying the sounds until the hearing is detected, causlng the person to simulate the sounds which he hears, and transmitting and amplifying the same similarly to the ori inal sounds to his own hearing senses or comparison.

3. The method of training the voices of persons of defective hearing and speech, which consists in electrically transmitting to such }person amplified speech. sounds, causing t ing the same similarly to the original sounds to 1115 own hearing senses for comparison, and causlng the person to hear his own voice.

In testimony WhGIGOfyI set my hand, this 14th day of September, 1926.

I HAROLD L. WARWICK.

e person to simulate the sounds which he hears; transmitting and amplify- 

